Tim is on the downslope. Manu will never be Manu of 2005 and will likely be making frequent trips to the IR the rest of his career.
Manhimi is one constant injury after another. Mason and Hill are nice players, but they aren't going to pick up any major slack.
Unless the Spurs can pull off some miracle like trading Manu for Igudaga or Danny Granger (which would never happen in a million years), you can consider this thing over.
It's sad, but most NBA fans would kill to have had their teams make the run we did over the last decade.
It's hard to admit it's over and our hearts keep trying to tell us "there's a chance" but I think if most of us are honest with ourselves, we know it's over.